Weiss is currently sidelined with a tres major strain in his right shoulder, the Minneapolis Star Tribune reports.
He's not expected to resume playing catch for another week, according to the report. It sounds likely that Weiss will begin the season on the injured list or need more time in extended spring training before he's ready for the season. Weiss was claimed off waivers from the Red Sox in February and was expected to compete for a middle-relief role.